Brother 1240, HL-1030, 1250 service manual Black and blurred vertical streaks

CHAPTER 6 TROUBLESHOOTING

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Black and blurred vertical streaks

User Check

(1) Clean the corona wire in the drum unit.

(2) Check that the corona wire cleaner is at the home position.

(3) Check that the toner cartridge is not empty.

(4)The drum unit may be damaged. Install a new drum unit.

(5)The toner cartridge may be damaged. Install a new toner cartridge.

Possible cause	Step	Check	Result	Remedy
Corona failure	1	Is the vertical block streak	Yes	Return the wire cleaner to its
		about 10mm wide?		home position.
		(Check if the wire cleaner is at
		its home position.)
Dirt in the paper	2	Is the paper cassette or feed	Yes	Clean the toner off.
feed system		system on the drum unit dirty
		with toner?
Scratch on the	3	Is the drum surface scratched?	Yes	Replace the drum unit.
drum
Cleaning failure	4	Is the drum surface dirty with	Yes	Replace the drum unit.
		toner in streaks?
Scratch on the	5	Is the surface of the heat roller	Yes	Replace the fixing unit.
heat roller		scratched?

NOTE:

•If you print the same pattern continuously, the drum will be worn and black vertical streaks will appear on the paper.

•This problem may occur with noise due to the corona wire being dirty. In that case, clean the corona wire with the wire cleaner.

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